FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/mlin/linux.git block-generic-req
commit 86ecb9456ac74ba3996d05ca1b09a7756a31bfd7 ("block: make generic_make_request handle arbitrarily sized bios")

We found the following new message in kernel log, do you increase vmalloc usage in your patch?

[    6.939422] vmap allocation for size 16384 failed: use vmalloc=<size> to increase size.


Thanks,
Ying Huang